Zencoder Video

Allow easy integration with Zencoder transcoding service to make HTML5 compatible
video files. At the moment it generates up to 4 different formats:

mp4 (h.264)

ogg

webm

low-resolution (640x480) mp4.

These formats are based on Zencoder's HTML5 video job template. If there's
enough request for additional formats, they could be added in later versions.
Just didn't want to overcomplicate this initial release.